So the cache servers are HA behind something (F5 LTM, Cisco local director,
something else). Are the authoritative servers? It would seem sensible to do
the same with them. That way a timeout only occurs if the whole HA cluster
is unavailable.
You can alleviate even that situation by seeding the ca
I have been working on building out a couple of large data centres and
have been struggling with how to set up the systems so that we get a high
resilience, highly responsive DNS service in the presence of failing
equipment.
The configuration we have adopted includes a layer of BIND 9.6.x servers
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